Is now the time, if the system wants 4 super-conferences @ 16 or so each, to make their move on the B12?
The thing is, there is no "system" that "wants 4 super conferences @ 16"
Remember that when "everyone is going to 12" we never actually had a single day of everyone at 12.
When the ACC and Pac-12 went to 12, the Big Ten and SEC went to 14 and the Big XII dropped to 10.
It is individual conferences making their own moves. This isn't like the NHL, who has realigned constantly due to expansion/imbalance, but the goal is an even number of divisions with an equal number of teams, sorted by geography.
I believe that most of the people on this site are PREDISPOSED to "seeking balance/order/organization in stuff. (This could be a fun Off Topic poll, BTW). We want order and symmetry because we crave it.
But college athletics is "conferences & schools chasing MONEY" and NOT chasing order, balance and structure for Division I or FBS.